BusinessComponents.OperationsComponent.UpdateExistingContact C# (CSharp) Method

        public static void UpdateExistingContact(CredentialsDetails credentialsDetails, ContactDetails contact, out string strRequest, out string strResponse)
        {
            string req;
            string res;

            //Get the contact data
            var xmlContact = ApiCallComponent.CallServiceGet(credentialsDetails, contact.Id, out req, out res);

            //Update the contact data
            var xContact = XDocument.Parse(xmlContact);
            var contactNode = (from f in xContact.Descendants(W3Ns + "content")
                               let element = f.Element(ConstantContactNs + "Contact")
                               where element != null
                               select element).FirstOrDefault();

            if (contactNode != null)
            {
                contactNode.SetElementValue(ConstantContactNs + "FirstName", contact.FirstName);
                contactNode.SetElementValue(ConstantContactNs + "LastName", contact.LastName);
            }

            //Put the updated contact data
            ApiCallComponent.CallServicePut(credentialsDetails, contact.Id, xContact.Declaration.ToString() + xContact, out strRequest, out strResponse);
        }